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Our 44th Anniversary present to you- Tire & Tube changes made easy!

You're not wrong- modern tires and tubes are more difficult to install than they used to be. More strength and prybar-like tools aren't the answer. You can out-smart that tough tire using technique! Our video will help make your next tire or tube change much easier! And since guys don't follow directions, women can watch this and show the boys how it's done. :-)

Feb 1, 1980- Chain Reaction Bicycles opened for business. Same ownership, same management, since Day 1! Life goes by at just the right speed on a bike. It's just as true today as it was 44 years ago.

I've been riding with Kevin for 15 years, another 35 before that, and somehow missed this unusual place in the hills behind Cupertino. It looks like the abandoned steel mill from the original Robocop. 5 sets of tracks! What did this look like when it was in its heyday, manufacturing cement for Shasta Dam? Finding places like this is what makes it so fun to ride a bike! You don't need a car, you don't even need a plan. You just look up into the hills and wonder, what's that? How do I get there? --MikeJ

We can put that smile on your face. That's really what we sell. Smiles. Whether it's an ebike to extend your range, a trainer to help stay in shape when it's raining, a mountain bike to get completely away from cars or bikes for your kids so you're not driving them to school. We've got it. And more. 

We are still experiencing high peak-time demand, particularly on Mondays from 11am-1pm and other days from 3:30 pm until closing. The phone might go unanswered until all customers in the store are taken care of; we encourage you to send inquiries to and we'll get back to you later that day.  
Masks- Not required but we encourage you to feel comfortable and wear one if you'd like! Everyone who's traveled recently seems to have a Covid story to tell.

Can you build or finish the assembly of my ebike? Currently Chain Reaction is certified for Bosch, Shimano, TQ, Fazua, BEPS and Hyena. These are popular with the better brands found in many bike shops, but on-line bikes are usually using other, less-well-supported drive systems. Assembly should be done only by a shop certified for the drive system your bike uses. We encourage you to contact whomever you purchased your on-line ebike from to find out if they have authorized service available where you live, before buying the bike. Do not accept the line "We use standard components any shop can work with." It's usually a cover for not providing adequate support for local dealer service.

Yes, we have bicycles on sale!

Trek Domane SLR 9 eTap Gen 4
$11,999.99 - $13,199.99 $13,199.99 Up To 9% Savings
Domane SLR 9 is our top ultralight carbon endurance road bike decked out wi...
Trek FX 2 Disc
$749.99 $799.99 6% Savings
FX 2 Disc is a stylish and versatile hybrid bike with disc brakes that let ...
Trek Checkpoint SLR 7
$7,999.99 $8,549.99 6% Savings
Checkpoint SLR 7 is a carbon gravel bike that's built for crushing the worl...
Trek Emonda SL 5
$2,699.99 $3,349.99 19% Savings
Émonda SL 5 Disc is a lightweight carbon road bike with a balanced ride qua...
Trek Checkpoint ALR 5 Driftless
$2,299.99 $2,899.99 21% Savings
Checkpoint ALR 5 Driftless is a custom-painted, high-quality gravel bike th...
Trek Domane SL 5 Gen 4
$2,999.99 $3,499.99 14% Savings
Domane SL 5 is ready to take on rough roads and long miles with a ride that...
Trek Emonda SLR 7
$8,099.99 $8,999.99 10% Savings
Emonda SLR 7 Disc is an ultralight, aerodynamic carbon road bike that's des...
Electra Loft 7D Ladies'
$499.99 - $549.99 $649.99 Up To 23% Savings
This is your city. Ride like it. The Loft 7D is a lightweight commuter that...
Trek Checkpoint ALR 5
$1,999.99 $2,499.99 20% Savings
Checkpoint ALR 5 is the best value gravel bike in the lineup. It's a high-q...
Trek Fuel EX 8 Gen 5
$3,499.99 - $3,929.99 $3,929.99 Up To 11% Savings
Fuel EX 8 is the ideal trail bike for riders who want a versatile full susp...
Trek Fuel EX 7 Deore/XT Gen 6
$3,199.99 $3,699.99 14% Savings
Fuel EX 7 is a do-anything trail machine evolved to eat up singletrack. Upg...
Trek Checkpoint SL 5
$2,799.99 $3,399.99 18% Savings
Checkpoint SL 5 is a carbon gravel bike made for epic all-road adventures. ...